Ring shank



FIG. 1 is a perspective view of a ring shank showing my new design;

FIG. 2 is a cross-sectional view of the ring shank of FIG. 1 taken along line 2—2 of FIG. 1;

FIG. 3 is a perspective view of an alternative embodiment of a ring shank showing my new design; and,

FIG. 4 is a cross-sectional view of the ring shank of FIG. 3 taken along line 4—4 of FIG. 3.

The broken line showing in FIGS. 1 through 4 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a ring shank, as shown and described. 